Climatology of noctilucent cloud radii and occurrence frequency using SCIAMACHY

Details Climatology of noctilucent cloud radii and occurrence frequency using SCIAMACHY Climatology of noctilucent cloud radii and occurrence frequency using SCIAMACHY

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71..408r&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 3-4, p. 408-423.

Physics

10

Noctilucent Clouds, Polar Mesospheric Clouds, Particle Size, Sciamachy, Climatology

Scientific paper

We present a climatology of noctilucent cloud (NLC) occurrence rate (northern and southern hemisphere) and particle size (northern hemisphere) based on SCIAMACHY measurements between 2002 and 2007. An interannual analysis of occurrence rates shows no trend in the northern hemisphere despite the decreasing solar activity during that period. The mean NLC particle radius for a Gaussian particle size distribution with is . There is an increase of the particle size with latitude, with a gradient as large as for latitudes larger than 75o. SCIAMACHY observes an increase of mean NLC particle size during the last 5 years at latitudes higher than 70o, which might be linked to the decrease in solar activity. The interannual variability of the seasonally averaged particle size is in a given latitude band. Results concerning the sensitivity of the retrieval to the particle shape and particle size distribution assumed width are also presented.

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